SHAUN HOW IT’S DONE: Although he has lost nearly 50 pounds from the weight he carried in the spring, veteran defensive lineman Shaun Rogers (73, walking with Linvall Joseph behind Giants coach Tom Coughlin during OTAs in June) has been an eye-opener during training camp and is expected to help Big Blue this season. Photo: Anthony J. Causi

ALBANY — There are big guys and then there is Shaun Rogers, who is the biggest Giant of them all.

There are defensive linemen competing in training camp of various shapes and sizes and then there is the venerable Rogers, who his position coach, Robert Nunn, acknowledges isn’t like the others.

“He is a different look,’’ Nunn said, and there’s really no way to dispute that observation.

Rogers is 6-foot-4, which by itself doesn’t distinguish him from the pack. After all, that is the same height as Linval Joseph, the improving third-year starter at defensive tackle, and the very good-sized Joseph is 323 pounds. Rogers, on the other hand, is listed at 350 and looks every bit of it as the heaviest player on the 90-man roster.

But Rogers is considerably less large than he was in the spring, when he was signed and reported to his new team carrying too much tonnage.

“The number I heard was around 400,’’ Justin Tuck said. “Rumors get spread. I know he’s a large man, strong man and for how big he is he’s very athletic too. They gave him a playing weight, he did a great job of getting to that weight coming into camp. That right there shows you his motivation. I think he lost almost 40, 50 pounds.’’

Someone in the know said Rogers reported to training camp slightly under 350; he would not divulge his actual weight.

“I lost enough — enough to make them happy — so that’s all that matters,’’ Rogers said.

Coach Tom Coughlin said Rogers “made his weight easily’’ and called the reduction “an incredible job.’’ The concern now, Coughlin said, is that Rogers has been “a little bit weak because of the weight loss. We’d like to have him gain his strength back and still maintain that very good weight position.’’

Defensive line is by far the strongest, deepest position on the Giants and Rogers, 33, is trying to hook on in what might be his last chance to extend his NFL career. He has done nothing thus far in the heat at the University at Albany to hurt his chances and, quite the contrary, the first week of training camp has prompted Nunn to state, “I really think Shaun’s going to be a guy who can really help us on Sundays.’’

Rogers is not only the biggest but, at 33, also is the second-oldest player on the 90-man roster — after 34-year-old kicker Lawrence Tynes. Rogers is trying to make it into a 12th NFL season and more than once in conversation referred to himself as old.

“Don’t take that, the ‘old’ comment, for a lack of motivation, movement or weakness,’’ Rogers said. “It’s just, the fact that, you know, I am an older guy and that’s just the way we kid around with it. Some of these guys were in junior high when I was drafted or maybe even elementary [school], so it’s most definitely something to kid with.’’

Rogers hopes to extend a career that, until last year, was filled with losing. He spent the first seven years of his career with the Lions, going 32-80, and the next three seasons with the Browns, going 14-34. Ten years, no winning seasons, no playoffs, 45 wins and 115 losses. Last season, Rogers finally got a taste of success, playing in every game for the Saints as they went 13-3 before losing in an NFC divisional game at San Francisco.

Now he has aligned himself with the Super Bowl champions.

“Well, there are still things left to prove,’’ Rogers said. “Coming into an atmosphere where these guys won a championship last year, with championship experience, that is one of the things on my resume that I am lacking. That is motivation for me. I want to play a part in it and hopefully get another ring for these guys and not just be along for the ride.’’